Electrically conductive PTC ink with double switching temperatures and applications thereof in flexible double-switching heaters
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United States of America
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Apr 12, 2022
Grant Date -
May 6, 2021
app pub date -
Dec 20, 2020
filing date -
Dec 20, 2020
priority date (Note) -
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Abstract
An article comprising a double-switching heater that comprises a double-switching PTC ink deposited on a flexible substrate to form one or more resistors. The double-switching PTC ink comprises a first resin and a second resin; the first resin provides a first PTC effect within a first temperature range (T1, T2); the second resin provides a second PTC effect within a second temperature range (T3, T4), where T3≥T2; the first resin has an NTC effect above the first temperature range; the second PTC effect is greater than the first PTC effect; and the second PTC effect overlaps with, and is greater than, the NTC effect of the first resin. The substrate can be either thermal polyurethane, nylon or a polyester blend.
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International Classification(s)
- H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
- H05B:ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE ....
- C09D:COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQ....
- A41D:OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- F25C:PRODUCTION, WORKING, STORING OR DISTRIBUTION OF IC....
- E04C:STRUCTURAL ELEMENTS; BUILDING MATERIALS
- H01C:RESISTORS
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